I rescued a sick Persian from my front yard last friday and the RSPCA offered not much help. Anyway she was very snuffely and was prescribed Synulox tabs 50mg from the vet, also had a couple of jabs??. She has been taking these since saturday and has now vomited a couple of times this evening and had a little diorreah. Unfortunatly nobody seems to missing her as i have searched endlessly for her owner so I have no medical history. I am so worried and she is now a very welcome member of my family. Could this vomiting be a side affect? ( unsure of her age as vet did not check this outt, think she may be young though not a small kitten)